Improved curtain fixture



A. H. KNAPP.

CURTAIN FIXTURE.

No. 60,908.' Patented Jan, 1, 1867 l ,gw

Riw m: Ncmms Para oooooooooooooooooooooooooooooooo c.

uiten istria stwt ffm.

A. H. KNAPP, OF NEWTON CENTRE, MASSACHUSETTS.

Letters Patent No. 60,908, dated January 1, 1867.

IMPROVED CURTAIN FIXTURE.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, A. H. KNAPP, of Newton Centre. in the county of Middlesex, and State of Massachusetts, have invented an Improved Window-Shade Fixture; and I do hereby declare that the following is a fulliand exact description, reference being had to the accompanying drawings, making part of this specification- Figure 1 being a front view of the fixture as applied with a window-shade to a window.

Figure 2 a side View of the shade roller or stick.

Figure 3 a transverse section of the roller.

Figure 4 a side view of one of the journal bearings of the roller.

Figure 5 a cross-section of the balance spring and parts connected directly therewith.

Likeletters designate corresponding parts in all of the figures.

To balance the shade, I make use of a simple coiled spring, B, arranged in one of the supporting brackets, ns A, of the xture, working perfectly when the motionv of this spring is geared up to a s'uiicient increase to enable the spring to be reduced in strength and the roller to haveenough extent of movement to correspond with the weight of the shade and the distance it has to move to shade the Window. In order to e'ect this gearing up` of the motion from the spring, a single cog-wheel,'E, on the shaft C of the spring, and of about the size' shown, and gearing into a pinion, F, also of about the size indicated, will be suitable for o'rdinary use. The shaft I of the pinion F is provided with asquare or equivalent formof coupling projection, d, to fit into a socket of the same form and size in the end of or of the journal bearings H of the roller, as shown atf, figs. 5E, 3, and 4.' The other journal ofi'the roller rests in a simple bracket, K, as s een in iig. 1. Thus arranged, the` end of the roller resting in the bracket K is readily lifted out therefrom at any time, when it can at once be uncoupled from the gearedshaft I of the bracket A. Inconnfection with this. construction and arrangement of the'spring'anduits connecting parts,`as described, there is also to be added a projecting knob or milled head, D, on the shaft C of the spring. The use of this knob is to wind up the spring or tohold the spring from yunwinding when the shade roller isdisco'nnected from the geared shaftv I. And when the shade is found to be either -too heavy or too light for-the spring, as adjusted at any time, the roller is tobe-diseonnected from the shaft I v and the spring wound up alittle more or unwounda little by the knob D, to adjust the strength eiractly as desired. The spring is so adjusted that, when left tolitself, the shade will neither be Wound up nor unwind at any height; but by lifting a little at the-lower end thereofit will immediately ascend. The spring shaft() may have the usual ratchet-wheel, b, and pawl, e, to enable it to be wound up at any time, and adjustedrto greater strength without disconnecting the shade roller. But this ratchet-wheel and pawl'may be'dispensed with. The bracket-A may have a cover, a, to conceal the movement inside, and may have any desired vform and finish for ornamental appearance. The shade L is attached 'to the roller E bya' groove in the roller, in which the upper endof the shade is held by a wedge strip, g, as shown. I alsol make a square or angular' hole or recess, G, entrelythroilgh the centre of the roller, from end,to end, for thereception of the shanks of journal bearings H.' H,as represented. vThis recess is vmade in connection with the wedge groove in the roller.

Otherwise it would be difficult and costly to make. The object of this is to enable the roller to be cut to any 1 length and yet have the journal bearings applicablelrto the ends anywhere, the Shanks thereof fitting the 'sanne i at all points in its length. This xture works quite perfectly, is not liable to get out of order, and is comparatively very cheap for a balance ixture.

What I claim asvmy invention, and desire to secure by LettersPatent, is-

'lhecombination of the projecting knob or milled head D with the coiled spring B, cog-wheeland pinion E and F, and roller coupling d, substantially as and for the purpose herein specified.

I-also claim the square, angular, or equivalent form of recess G, through the centre of the roller, formed connection with the wed e roove therein vfor the purpose set'forth m g g A. H. KNAPP.

Witnesses:

D. H. Parser, .Tnnw E. Msnsluu.. 

